Need suggestion about oc

[Bodhisatwa]

Hi! my cpu configuration is below--
amd athlon x2 260 3.2 ghz proceesor
4gb starlite ddr3 1333 ram
gigabyte 78lmts2p motherboard
iball lpe223-400 smps
lg l1515s tft monitor

as suggested by the other members ,i bought the 6670 1gb ddr5 today!

i think my processor is bottlenecked by the gpu..
what does overclocking the cpu do?how does it help?

 

[Bodhisatwa]

please help..